Abstract: The selected pulse ground motion is decomposed by the sub-band wavelet division method. Under the condition that the main characteristics of the pulse are unchanged, a series of pulse ground motions with different time-frequency distributions are obtained by artificial transformation, which acts on different periods of SDOF, and obtain the maximum displacement of the system. The results show that the pulse ground motion has a great influence on the structure. Besides the influence of the pulse characteristics, the influence of the time-frequency non-stationary characteristics is also worthy of attention.